1 /* smp.h: Sparc specific SMP stuff.
3 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
9 #include <linux/config.h>
10 #include <linux/threads.h>
12 #include <asm/btfixup.h>
16 #include <linux/cpumask.h>
18 #endif /* __ASSEMBLY__ */
24 #include <asm/ptrace.h>
26 #include <asm/atomic.h>
29 * Private routines/data
32 extern unsigned char boot_cpu_id;
33 extern cpumask_t phys_cpu_present_map;
34 #define cpu_possible_map phys_cpu_present_map
36 typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long,
37 unsigned long, unsigned long);
40 * General functions that each host system must provide.
43 void sun4m_init_smp(void);
44 void sun4d_init_smp(void);
46 void smp_callin(void);
47 void smp_boot_cpus(void);
48 void smp_store_cpu_info(int);
51 void smp_bogo(struct seq_file *);
52 void smp_info(struct seq_file *);
54 BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long)
55 BTFIXUPDEF_CALL(void, smp_message_pass, int, int, unsigned long, int)
56 BTFIXUPDEF_CALL(int, __hard_smp_processor_id, void)
57 BTFIXUPDEF_BLACKBOX(hard_smp_processor_id)
58 BTFIXUPDEF_BLACKBOX(load_current)
60 #define smp_cross_call(func,arg1,arg2,arg3,arg4,arg5) BTFIXUP_CALL(smp_cross_call)(func,arg1,arg2,arg3,arg4,arg5)
61 #define smp_message_pass(target,msg,data,wait) BTFIXUP_CALL(smp_message_pass)(target,msg,data,wait)
63 static inline void xc0(smpfunc_t func) { smp_cross_call(func, 0, 0, 0, 0, 0); }
64 static inline void xc1(smpfunc_t func, unsigned long arg1)
65 { smp_cross_call(func, arg1, 0, 0, 0, 0); }
66 static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2)
67 { smp_cross_call(func, arg1, arg2, 0, 0, 0); }
68 static inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2,
70 { smp_cross_call(func, arg1, arg2, arg3, 0, 0); }
71 static inline void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2,
72 unsigned long arg3, unsigned long arg4)
73 { smp_cross_call(func, arg1, arg2, arg3, arg4, 0); }
74 static inline void xc5(smpfunc_t func, unsigned long arg1, unsigned long arg2,
75 unsigned long arg3, unsigned long arg4, unsigned long arg5)
76 { smp_cross_call(func, arg1, arg2, arg3, arg4, arg5); }
78 static inline int smp_call_function(void (*func)(void *info), void *info, int nonatomic, int wait)
80 xc1((smpfunc_t)func, (unsigned long)info);
84 static inline int cpu_logical_map(int cpu)
89 static inline int hard_smp4m_processor_id(void)
93 __asm__ __volatile__("rd %%tbr, %0\n\t"
100 static inline int hard_smp4d_processor_id(void)
104 __asm__ __volatile__("lda [%%g0] %1, %0\n\t" :
105 "=&r" (cpuid) : "i" (ASI_M_VIKING_TMP1));
110 static inline int hard_smp_processor_id(void)
115 __asm__ __volatile__("rd %%tbr, %0\n\t"
117 "and %0, 3, %0\n\t" :
120 __asm__ __volatile__("lda [%g0] ASI_M_VIKING_TMP1, %0\n\t"
123 See btfixup.h and btfixupprep.c to understand how a blackbox works.
125 __asm__ __volatile__("sethi %%hi(___b_hard_smp_processor_id), %0\n\t"
126 "sethi %%hi(boot_cpu_id), %0\n\t"
127 "ldub [%0 + %%lo(boot_cpu_id)], %0\n\t" :
132 static inline int hard_smp_processor_id(void)
136 __asm__ __volatile__("mov %%o7, %%g1\n\t"
137 "call ___f___hard_smp_processor_id\n\t"
139 "mov %%g2, %0\n\t" : "=r"(cpuid) : : "g1", "g2");
144 #define raw_smp_processor_id() (current_thread_info()->cpu)
146 #define prof_multiplier(__cpu) cpu_data(__cpu).multiplier
147 #define prof_counter(__cpu) cpu_data(__cpu).counter
149 #endif /* !(__ASSEMBLY__) */
151 /* Sparc specific messages. */
152 #define MSG_CROSS_CALL 0x0005 /* run func on cpus */
154 /* Empirical PROM processor mailbox constants. If the per-cpu mailbox
155 * contains something other than one of these then the ipi is from
156 * Linux's active_kernel_processor. This facility exists so that
157 * the boot monitor can capture all the other cpus when one catches
158 * a watchdog reset or the user enters the monitor using L1-A keys.
160 #define MBOX_STOPCPU 0xFB
161 #define MBOX_IDLECPU 0xFC
162 #define MBOX_IDLECPU2 0xFD
163 #define MBOX_STOPCPU2 0xFE
167 #define NO_PROC_ID 0xFF
169 #endif /* !(_SPARC_SMP_H) */